How do you budget?
In my most eloquent masters prepared response I would give you the mechanics of listing all repetitive expenses- mortgage, utilities, food, auto, pet, etc. and then I would work up a spreadsheet and then plan savings, etc. Having a business means doing this a second time planning spending, projecting income and setting aside reserves.
I think you can find much more detailed guides online so for the sake of brevity I will spare you details. There is a quick video worth watching: https://youtu.be/pZDxU74V924